I worked in the building above the Holland tunnel... (1 Hudson Sq.)...and was 'corralled' on that block for several hours.. but, took 27 photos on my way to work that day, along Canal st., NYC..
Ian Hochberg, who lives in Maryland, visited the WTC in the 1970s and remembers the silence on the observation deck. He visited Ground Zero in October and was again struck by the silence amid the destruction.